#property copyright "Copyright © 2012, Zhaslan"
#property link      ""
//----
#property indicator_separate_window
#property indicator_buffers 2
//----
extern int MA_Period=14;
extern color Color1 = Blue;
extern color Color2 = Red;
//----
double Bulls[];
double Bears[];
double TempBulls[];
double TempBears[];

int ExtCountedBars=0;

//+------------------------------------------------------------------+
//| Custom indicator initialization function                         |
//+------------------------------------------------------------------+
int init()
  {
   IndicatorBuffers(4);
   IndicatorShortName("Bulls&Bears");
//---- indicators
   SetIndexStyle(0, DRAW_LINE, EMPTY, 2, Color1);
   SetIndexBuffer(0, Bulls);
   SetIndexLabel(0, "Bulls");
   SetIndexStyle(1, DRAW_LINE,EMPTY, 2, Color2);
   SetIndexBuffer(1, Bears);
   SetIndexLabel(1, "Bears");
   SetIndexBuffer(2, TempBulls);
   SetIndexBuffer(3, TempBears);
   return(0);
  }
//+------------------------------------------------------------------+
//| Custor indicator deinitialization function                       |
//+------------------------------------------------------------------+
int deinit()
  {
//----
   return(0);
  }
//+------------------------------------------------------------------+
//| Custom indicator iteration function                              |
//+------------------------------------------------------------------+ 
int start()
  {
   int i, j, counted_bars=IndicatorCounted();
   double razmer_tika, ravenstvo;
   if(Bars<=MA_Period) return(0);
 

//----
   int limit=Bars-counted_bars;
   if(counted_bars>0) limit++;
   for(i=0; i<limit; i++)
   {
      razmer_tika=(High[i]-Low[i])/Volume[i];
      if (Open[i] > Close[i])
         ravenstvo=((High[i]-Low[i])-(Open[i]-Close[i]))/(2*razmer_tika);
      if (Open[i] < Close[i]) 
         ravenstvo=((High[i]-Low[i])-(Close[i]-Open[i]))/(2*razmer_tika);
      if (Open[i] > Close[i])
         TempBulls[i] = (Open[i]-Close[i])/razmer_tika + ravenstvo;
         else  TempBulls[i] = ravenstvo;
      if (Open[i] < Close[i])
         TempBears[i] = (Close[i]-Open[i])/razmer_tika + ravenstvo;
         else  TempBears[i] = ravenstvo;         
   }


ExtCountedBars=IndicatorCounted();
//---- check for possible errors
   if (ExtCountedBars<0) return(-1);
//---- last counted bar will be recounted
   if (ExtCountedBars>0) ExtCountedBars--;
//----
  lwma1();
  lwma2();
   return(0);
  }
//+------------------------------------------------------------------+

//+------------------------------------------------------------------+
//| Linear Weighted Moving Average for Bulls                                  |
//+------------------------------------------------------------------+
void lwma1()
  {
   double sum=0.0,lsum=0.0;
   double price;
   int    i,weight=0,pos=Bars-ExtCountedBars-1;
//---- initial accumulation
   if(pos<MA_Period) pos=MA_Period;
   for(i=1;i<=MA_Period;i++,pos--)
     {
      price=TempBulls[pos];
      sum+=price*i;
      lsum+=price;
      weight+=i;
     }
//---- main calculation loop
   pos++;
   i=pos+MA_Period;
   while(pos>=0)
     {
      Bulls[pos]=sum/weight;
      if(pos==0) break;
      pos--;
      i--;
      price=TempBulls[pos];
      sum=sum-lsum+price*MA_Period;
      lsum-=TempBulls[i];
      lsum+=price;
     }
//---- zero initial bars
   if(ExtCountedBars<1)
      for(i=1;i<MA_Period;i++) Bulls[Bars-i]=0;
  }
//+------------------------------------------------------------------+

//+------------------------------------------------------------------+
//| Linear Weighted Moving Average for Bears                                  |
//+------------------------------------------------------------------+
void lwma2()
  {
   double sum=0.0,lsum=0.0;
   double price;
   int    i,weight=0,pos=Bars-ExtCountedBars-1;
//---- initial accumulation
   if(pos<MA_Period) pos=MA_Period;
   for(i=1;i<=MA_Period;i++,pos--)
     {
      price=TempBears[pos];
      sum+=price*i;
      lsum+=price;
      weight+=i;
     }
//---- main calculation loop
   pos++;
   i=pos+MA_Period;
   while(pos>=0)
     {
      Bears[pos]=sum/weight;
      if(pos==0) break;
      pos--;
      i--;
      price=TempBears[pos];
      sum=sum-lsum+price*MA_Period;
      lsum-=TempBears[i];
      lsum+=price;
     }
//---- zero initial bars
   if(ExtCountedBars<1)
      for(i=1;i<MA_Period;i++) Bears[Bars-i]=0;
  }
//+------------------------------------------------------------------+